What’s Vulnerable › Vulnerabilities

CVE-2021-42550: RCE from attacker with configuration edit priviledges through JNDI lookup

• Severity: medium (CVSS 6.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-16 · updated 2026-06-17
• Weakness: CWE-502

Description

In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files could craft a malicious configuration allowing to execute arbitrary code loaded from LDAP servers.

Affected products

• Cloud Manager: all versions
• NetApp Service Level Manager: all versions
• NetApp Snap Creator Framework: all versions
• Qos Logback: through 1.2.7; 1.3.0-alpha0, 1.3.0-alpha1, 1.3.0-alpha10, 1.3.0-alpha2, 1.3.0-alpha3, 1.3.0-alpha4 (+5)
• Red Hat Satellite 6: 6.0
• Siemens SINEC NMS: before 1.0.3 — fixed in 1.0.3

How to fix

Upgrade to a fixed version: Siemens SINEC NMS 1.0.3. Check the vendor advisory for mitigations.

References

• http://logback.qos.ch/news.html
• http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html
• http://seclists.org/fulldisclosure/2022/Jul/11
• https://cert-portal.siemens.com/productcert/pdf/ssa-371761.pdf
• https://github.com/cn-panda/logbackRceDemo
• https://jira.qos.ch/browse/LOGBACK-1591
• https://security.netapp.com/advisory/ntap-20211229-0001/
• http://logback.qos.ch/news.html
• http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html
• http://seclists.org/fulldisclosure/2022/Jul/11
• https://cert-portal.siemens.com/productcert/pdf/ssa-371761.pdf
• https://github.com/cn-panda/logbackRceDemo

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